How can I convert, for example, view.WidthRequest value to platform pixels? I'm looking for method like Device.ConvertToPixels(10).
I want to use it for SkiaSharp drawing. For example I want to draw circle with stroke = 10 in (xamarin.forms units) which will be converted to pixels on draw.
Multiply MainDisplayInfo.Dencity by (xamarin.forms units) and you get that pixels.
I made a method.
double XamDIUConvertToPixels(double XamDIU)
{
var desplayinfo = DeviceDisplay.MainDisplayInfo;
var pixcels = desplayinfo.Density * XamDIU;
return pixcels;
}
DeviceDisplay must be done on the UI thread or else an exception will be thrown in iOS.
read this: https://docs.microsoft.com/en-us/xamarin/essentials/device-display?tabs=ios#platform-differences
You can also do a scale at the top of the draw and then use whatever units you like.
For example, on a 2x display, you can do a canvas.Scale(2) and then draw as if it was a 1x.
In the case of a Xamarin.Forms paint event, there is the event args that has all the info you need:
canvas.Scale(e.Info.Width / view.Width);
Also, you can have a look at this blog post where I show off some things: https://dotnetdevaddict.co.za/2020/01/12/who-cares-about-the-view-anyway/
You could try the code below:
In Android:
var dp = 100;
int pixel = (int)TypedValue.ApplyDimension(ComplexUnitType.Dip, dp, this.Resources.DisplayMetrics);
In Xamarin.Forms, try to use the Dependency Service. https://docs.microsoft.com/en-us/xamarin/xamarin-forms/app-fundamentals/dependency-service/introduction